Collectible coins encompass a vast array of types, including patterns, trial coins, and various special editions. Trial coins, such as those produced in 1867, were often created to test new designs, materials, or minting techniques and may not have been intended for general circulation. These items, particularly when associated with significant historical contexts like the United States, can attract collectors due to their rarity and unique attributes. The designation "unknown" may refer to the lack of specific information regarding certain coins, making their provenance or significance less clear within the broader coin collecting community.

Item Denomination Series Year Mint
1867-- (Unknown) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1867 Unknown